What is the CVSS score of CVE-2023-7220?

CVE-2023-7220 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Nr1800x Firmware are affected by CVE-2023-7220?

Organizations using A vulnerability face critical risk from CVE-2023-7220, a stack-based buffer overflow vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2023-7220?

Yes, a public proof-of-concept exploit is available for CVE-2023-7220. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2023-7220?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Nr1800x Firmware CVE-2023-7220

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2024-01-09 cna@vuldb.com

Stack Overflow Buffer Overflow Nr1800x Firmware

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

PoC Detected

Nov 21, 2024 - 08:45 vuln.today

Public exploit code

CVE Published

Jan 09, 2024 - 08:15 nvd

CRITICAL 9.8

DescriptionCVE.org

A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Affected by this issue is the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-249854 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-121. A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Affected by this issue is the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-249854 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way. Affected products include: Totolink Nr1800X Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.